Fourths to moss moselt



(No Model.) 2 Sheets-Sheet 1.

E. H. FREEMAN.

FLUID PRESSURE REGULATOR.

N0. 574,846. v Patented Jan. 5, 1897.

ye w7 l 0414. M j ggm g 2 Sheets-Sheet 2.

(No Model.)

E. H. FREEMAN.

FLUID PEEssUEE REGULATOR.

Patented Jan. 5 1897.

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UNITED STATES ATENT FFICE.'

EDGAR II. FREEMAN, OF ROCHESTER, NE\V YORK, ASSIGNOR OF THREE- FOURTHS TO MO$S MOSELY, OF SAME PLACE.

FLUID-PRESSURE REGULATOR.

SPECIFICATION forming part of Letters Eatent No. 574,846, dated January 5, 1897.

Application filed July 16, 1894. Renewed July 11, 1896. Serial No. 598,905. (No model.)

To all whom, it may concern:

Be it known that I, EDGAR H. FREEMAN, of Rochester, in the county of Monroe and State of New York, have invented a certain new and useful Improvement in l luid-Pressure Regulators; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the drawings accompanying this application.

The object of my improvement is to regulate the pressure of air in a tank by means of an electric apparatus in which a motor is used, the motor being set in motion when the compression falls below a given degree and stopped when the maximum degree is reached.

The invention consists in the combination and arrangement of parts hereinafter described, and embodied in the claims.

In the drawings, Figure 1 is a side elevation, partially in section, of the apparatus. Fig. 2 is a plan view. Figs. 3, 4t, and 5 are onlarged elevations of the switch apparatus, showing different positions of the switch-arm.

A indicates a motor of any suitable form.

13 is a tank having an inlet-pipe C6 and exit pipe Z).

O is a pump by which air is forced through pipe a into the tank. It is driven by a crank c on the shaft of aband-wheelD. This bandwheel is connected with a pulley E on the shaft of the motor by a band F. By this means the motor drives the pump.

G is a casing containing a diaphragm II. The casing is supplied with air under the diaphragm by means of a stand-pipe a, con.-

nected with the pipe at, by which means the pressure under the diaphragm is the same as that in the tank.

I is a lever above the diaphragm, pivoted to a fulcrum-arm cl, and connected with the diaphragm by a rod f. As the diaphragm rises and falls the lever rises and falls with it.

The lever is guided in moving up and down It is drawn forcibly electrodes or contaetpoints l 2 3 4, the first three being in the form of springs, and the last being fixed and forming a stop to the switch-arm as it comes in a horizontal position. Vhen the arm is swung to its highest position, as in Figs. 1 and 3, the arm is out of contact with all the electrodes, and the circuit is then broken and the motor is stopped. In its partial down movement, as shown in Fig. 4, the arm comes in contact with elec trodes 1, 2, and 3 and serves as a conductor between them. Then fully down, as in Fig. 5, it comes in contact with. all four of the electrodes.

M is a dash-pot filled with glycerin, and K a rod connecting its piston with the arm L on one side of the pivot. Its object is to prevent too-rapid movement of the arm in ris ing and falling.

N is a crank-arm turning freely on the same center with the switch-arm.

Z is a rod connecting the outer end of the crank-arm with the long end of the lever I, and m is a spring connecting the outer end of the crank-arm with a stop a of the switcharm on the opposite side of the pivot.

0 is a stop to the upstroke of the switcharm.

29 is a gage connected with the air-tank to indicate pressure.

The electrical connections are as follows: 5 and 6 are the main circuit-wires leading from the battery or other source of electrical energy, one connecting with the electrode 1 and the other with the field of the motor. 7 is awire connecting electrode 2 with the field of the motor. 8 is a wire .connecting electrode 3 with electrode 4 and provided with a resistance-coil 9 in its length. 10 is a wire connecting electrode 4: with brush a of the motor, and 11 is a wire connecting the other brush, 3, with the main wire 0.

The operation is as follows: hen the pressure is low in the air-tank, the diaphragm falls and with it the outer end of the lever I. This carries the crank arm N below the switch'arm L, as shown in Fig. 4, and the spring m, then being below the pivot, draws the switch-arm down, bringing it in contact with the electrodes 1 2 3, and thus establishing the circuits which were previously broken by the switch-arm being out of contact with the electrodes. The eireuit is nowtfrom wire 5, through electrode 1, the switrh-armll, eleetrode 2, wire 7, through the Iield ot' the motor, wire (3, baek to the lmttery. There is also another circuit; from wire 5, through eleetroifle t, switch-arm L, eleetrmle 3, wire resist;- anee-eoil t), electrode it, wire ill), brush 1, the arn'iature ot the motor, brush s, wire it, and. wire ti, back to the battery. The motor re eeives motion t'romthese t we eireuits through the field and armature, but is retarded by the resistance. Hence the motion is slow, whieh prevent s burn lug oi the wire and sluilek on the machinery. The further motion of the switch-arm L brings it; in eo'ntiaet with eleetrode it, s shown in Fig. 5, and the see ondarveireuit above deseribed is cut out, and a new eireuit is then established in its plaeevia, from wire 5, through electrode 'l,,--1witeharm ll, electrode 4-, wi re 11'), brushes 1' a, wire 11, and wire (3. The .resistanetj: being; eutout, the full l'oree ol' the motor is turned. on and the pump is operattal rapidly to fill the .ank. During this time the diaphragm ii and lever I are rising and drawing up the crank-arm N,

above the switch-arm as to bring the sprin m above the pivot again the switch-arm. is raised out ot' contact with the electrodes, as shown in Fig. 8, the circuit is broken again, and the motor steps.

This apparatus is useful in many tipOliltlOllkt where even pressure ot. the air is required in a tank, for instance, in raising liquids, sueh as beer, where the drawing of the liquid reemineetiiu it is also appli. i-able gas and liquid.

claim as new, and desire to seenre lndletters Patei'lt, is

1. In a tluidressure regulator, the eombination, with the mote and pump, of a pivoted swi teh-arlma pivoted eranlea rm,a spring eonneeting the two on opposite sides of the pivot, a set of three electrode; so ar-auged that the switch rests in. eontaet with all three when it is partiall; turned down, a fourth eleetrod i so arranged that the switeh rests in eentaet with all. four when turned fully down, and eleetrieal eormeetions connecting the electrodes with a battery and the motor, as and tor the purpose speeit'ied.

2. In a tluidpresmu'e regulator, the combiuation, with the motor and pump, of a pivoted switelraruua pivoted eraulc--arm,aspring said arms on opposite sides ot' the pivot, a dash-pot, a rod eonueetingg' the dashi pot with the switelrarm, a diaphragm, a lever 1 connected with the diaphragm so as to be opaud as soon as the latter rises at such height eratted by it, and a rod connecting the lever with the eraulearm, as and tor the purpose upeei ti ed.

in witness whereof l. have hereunto signed my name in the presence of two subseribiare witnesses.

il ll. 'l lililCYlILtN. lVilnesses:

R. l Oscaion, 'r. it lln'reujmsox. 

